The arrangement of sea and landmass along equator is regular as shown here:
The pattern along equaor of 30° span of S-America, 60° span of Atlantic Ocean, 30° of Africa from west coast to Great Rift Valley, 60° from Great Rift Valley to Indonesia, 30° from west coast of Indonesia to east coast of Indonesia, is quite obvious. Moreover, the pattern fits with the arrrangement of convection rolls within the mantle, considering that mantle material convects in rolls of equal hight and width under balanced conditions of flow.
The proof is found with the location of the Great Rift Valley, as it is not found in context with coast-to-coast distance, but from the west coast of Africa over to a geological phenomena within the continent, that is clearly there due to the inner forces of Earth.
To further examine the distribution of geological features, one can ‘zoom in’ on the Great Rift Valley, and see how it does comply in detail with the upper most convection rolls, close to the tectonic plate.